projects/smsdaemon/SmsPdu.cpp

/* using http://sourceforge.net/projects/libserial/
 */


#include "SmsPdu.h"

#include <string>
#include <sstream>

#include <time.h>
#include <stdlib.h> 

#include "common.h"
#include "util.h"

#include <iostream>

using namespace std;


namespace SmsPdu
{


        string SwitchChars(string input)
        {
                for (unsigned int i=1; i<input.length(); i+=2)
        {
                        char tmp = input[i];
                        input[i] = input[i-1];
                        input[i-1] = tmp;
                }
                return input;
        }

        string EncodePhonenr(string input)
        {
                if ( (input.length() % 2) == 1)
                        input.append("F");
                return SwitchChars(input);
        }

        string DecodePhonenr(string input)
        {
                input = SwitchChars(input);
                int last = input.length() -1;

                if (input.at(last) == 'F')
                        input.erase(last,1);
                return input;
        }


        string HexformatVector(vector<unsigned char> vec)
        {
                ostringstream os;

                for (unsigned int i=0; i<vec.size(); ++i)
                {
                        os.width(2);
                        os.fill('0');
                        os << hex << uppercase << static_cast<unsigned int>(vec.at(i));
                }


                return os.str();
        }

        vector<unsigned char> HexDecodeString(string str)
        {
                vector<unsigned char> vec;
                for (unsigned int i=0; i<str.length(); i+=2)
                        vec.push_back( strtol( str.substr(i,2).c_str(), 0, 16 ));

                return vec;
        }

        std::string Decode8to7bit(vector<unsigned char> input, int shift_start = 0)
        {
                string result;

                int shift = shift_start;
                for (unsigned int i=0; i<input.size(); ++i)
                {
                        unsigned char current = input.at(i);
                        unsigned char prev = (i>0) ? input.at(i-1) : 0;

                        current <<= shift;

                        prev >>= (8-shift);

                        unsigned char byte = current | prev;
                        byte &= 0x7F;

                        result.append(1, byte);

                        if (shift == 6)
                                result.append(1, input.at(i) >> 1);

                        shift = (shift+1) % 7;

                }

                return result;
        }


        vector<unsigned char> Encode7to8bit(std::string str)
        {
                vector<unsigned char> buf;

                int shift = 0;
                for (unsigned int i=0; i<str.size(); ++i)
                {
                        unsigned char current = str.at(i) & 0x7F;
                        unsigned char next = ( (i+1)<str.size()) ? str.at(i+1) : 0;
                        next &= 0x7F;

                        current >>= shift;
                        next <<= (7-shift);

                        unsigned char byte = current | next;
                        buf.push_back(byte);

                        if (shift == 6)
                                i++;

                        shift = (shift+1) % 7;

                }

                return buf;
        }

        vector<PduInfo> CreateSmsPdu(string to, string message, bool allowMultipart)
        {
                bool multipart = allowMultipart && message.length() > 160;

                const unsigned char UDHI = multipart ? 0x40 : 0;

                srand(time(0));
                unsigned char csms_ref = rand() % 128;

                int part_count;

                const int PDU_LEN = 153;

                if (multipart)
                {
                        if (message.length() > 800)
                        {
                                Common::instance()->logMessage("Trying to send multipart sms > 800 bytes !!!");
                                message = message.substr(0,800);
                        }

                        part_count = message.length() / PDU_LEN;
                        if (message.length() % PDU_LEN)
                                part_count++;
                }
                else
                {
                        part_count = 1;
                }

                vector<PduInfo> result;
                for (int partnr = 0; partnr < part_count; ++partnr)
                {
                        vector<unsigned char> pdu;

                        pdu.push_back(0x00); // use SMSC from phone
                        pdu.push_back( 0x01|UDHI ); // first octet -- no timeout
                        pdu.push_back(0x00); // TP-MR message reference
                        pdu.push_back(to.length() ); //length of phone nr
                        pdu.push_back(0x81); // type of address (international nr  + ISDN/telephone range) - else try 0x81

                
                        string phone = EncodePhonenr(to);
                        pdu.insert( pdu.end(), phone.begin(), phone.end());

                        pdu.push_back(0x00); // Protocol identifier
                        pdu.push_back(0x00); // Data coding scheme 

                        string message_part;
                        if (multipart)
                        {
                                message_part = message.substr(0, PDU_LEN);
                                message.erase(0, PDU_LEN);

                                pdu.push_back( message_part.length()+ 7 );  //UserDataLength
                                pdu.push_back( 0x06 ); // UDH Len
                                pdu.push_back( 0x00 ); // UDH Element Identifier
                                pdu.push_back( 0x03 ); // UDH element length
                                pdu.push_back( csms_ref ); // csms_ref reference
                                pdu.push_back( part_count );
                                pdu.push_back( partnr+1 );
                                pdu.push_back( 0x00);

                        }
                        else
                        {
                                if (message.length() > 160)
                                {
                                        message_part = message.substr(0,160); //truncate to 160
                                        Common::instance()->logMessage("Truncated message");
                                }
                                else
                                {
                                        message_part = message;
                                }

                                pdu.push_back( message_part.length() ); //UserDataLength
                        }

                        vector<unsigned char> userData = Encode7to8bit(message_part);

                        pdu.insert( pdu.end(), userData.begin(), userData.end());

                        PduInfo info;
                        info.len = pdu.size()-1;
                        info.pdu = HexformatVector(pdu);
                        result.push_back(info);

                }
                return result;
        }

        typedef vector<unsigned char>::iterator char_it;

        string DecodeRawPhonenr(char_it start, char_it end)
        {
                ostringstream os;

                for (char_it it = start; it != end; ++it)
                {
                        os.width(2);
                        os.fill('0');
                        os << hex << (int)(*it);
                }
                return DecodePhonenr(os.str());
        }

        string DecodeTimestamp(char_it start, char_it end)
        {
                string stamp = DecodeRawPhonenr(start,end);

                ostringstream os;

                os << stamp.substr(0,2) << "/"; //year
                os << stamp.substr(2,2) << "/"; //month
                os << stamp.substr(4,2) << ","; //day
                os << stamp.substr(6,2) << ":"; //hour
                os << stamp.substr(8,2) << ":"; //minute
                os << stamp.substr(10,2) ; //second

                int timezone = strtol(stamp.substr(12,2).c_str(), 0, 16);


                if (timezone > 127)
                        os << "-";
                else
                        os << "+";

                os.width(2);
                os.fill('0');
                os << (timezone & 0x7F);

                return os.str();
        }


        SMS ParseSmsPdu(std::string pdu_str)
        {
                SMS result;

                vector<unsigned char> pdu = HexDecodeString(pdu_str);

                vector<unsigned char>::iterator it = pdu.begin();

                it += (*it++); // Skip smsc info

                unsigned char deliver_first_octet = (*it++);

                bool UDHI = (deliver_first_octet & 0x40) > 0;

                unsigned char sender_len = (*it++);
                if ( (sender_len % 2) == 1)
                        sender_len++;

                ++it; //ignore Type-Of-Address

                result.sender = DecodeRawPhonenr( it, it+(sender_len/2) );

                it += (sender_len/2);
                ++it; //protocol identifier
                ++it; //Data encoding

                result.timestamp = DecodeTimestamp(it, it+7);
                it += 7;


                unsigned char data_len = (*it++);

                int shift_start = 0;
                if (UDHI)
                {
                        int udh_len = (*it++); 
                        cout << "UDH_LEN:" << udh_len << endl;
                        it += udh_len; //just ignore the User Data Header
                        data_len -= udh_len;

                        shift_start = udh_len+1; //make the 8to7bit decode start with the right shift level
                }
                cout << hex<< (int)(*it) << endl;;


                vector<unsigned char> user_data;
                user_data.insert(user_data.end(), it, it+data_len);
                
                result.message = Decode8to7bit(user_data, shift_start);
                

                return result;
        }

}
1	/* using http://sourceforge.net/projects/libserial/
2	*/
3
4
5	#include "SmsPdu.h"
6
7	#include <string>
8	#include <sstream>
9
10	#include <time.h>
11	#include <stdlib.h>
12
13	#include "common.h"
14	#include "util.h"
15
16	#include <iostream>
17
18	using namespace std;
19
20
21	namespace SmsPdu
22	{
23
24
25
26	string SwitchChars(string input)
27	{
28	for (unsigned int i=1; i<input.length(); i+=2)
29	{
30	char tmp = input[i];
31	input[i] = input[i-1];
32	input[i-1] = tmp;
33	}
34	return input;
35	}
36
37	string EncodePhonenr(string input)
38	{
39	if ( (input.length() % 2) == 1)
40	input.append("F");
41	return SwitchChars(input);
42	}
43
44	string DecodePhonenr(string input)
45	{
46	input = SwitchChars(input);
47	int last = input.length() -1;
48
49	if (input.at(last) == 'F')
50	input.erase(last,1);
51	return input;
52	}
53
54
55
56
57	string HexformatVector(vector<unsigned char> vec)
58	{
59	ostringstream os;
60
61	for (unsigned int i=0; i<vec.size(); ++i)
62	{
63	os.width(2);
64	os.fill('0');
65	os << hex << uppercase << static_cast<unsigned int>(vec.at(i));
66	}
67
68
69	return os.str();
70	}
71
72	vector<unsigned char> HexDecodeString(string str)
73	{
74	vector<unsigned char> vec;
75	for (unsigned int i=0; i<str.length(); i+=2)
76	vec.push_back( strtol( str.substr(i,2).c_str(), 0, 16 ));
77
78	return vec;
79	}
80
81	std::string Decode8to7bit(vector<unsigned char> input, int shift_start = 0)
82	{
83	string result;
84
85	int shift = shift_start;
86	for (unsigned int i=0; i<input.size(); ++i)
87	{
88	unsigned char current = input.at(i);
89	unsigned char prev = (i>0) ? input.at(i-1) : 0;
90
91	current <<= shift;
92
93	prev >>= (8-shift);
94
95	unsigned char byte = current \| prev;
96	byte &= 0x7F;
97
98	result.append(1, byte);
99
100	if (shift == 6)
101	result.append(1, input.at(i) >> 1);
102
103	shift = (shift+1) % 7;
104
105	}
106
107	return result;
108	}
109
110
111
112
113	vector<unsigned char> Encode7to8bit(std::string str)
114	{
115	vector<unsigned char> buf;
116
117	int shift = 0;
118	for (unsigned int i=0; i<str.size(); ++i)
119	{
120	unsigned char current = str.at(i) & 0x7F;
121	unsigned char next = ( (i+1)<str.size()) ? str.at(i+1) : 0;
122	next &= 0x7F;
123
124	current >>= shift;
125	next <<= (7-shift);
126
127	unsigned char byte = current \| next;
128	buf.push_back(byte);
129
130	if (shift == 6)
131	i++;
132
133	shift = (shift+1) % 7;
134
135	}
136
137	return buf;
138	}
139
140	vector<PduInfo> CreateSmsPdu(string to, string message, bool allowMultipart)
141	{
142	bool multipart = allowMultipart && message.length() > 160;
143
144	const unsigned char UDHI = multipart ? 0x40 : 0;
145
146	srand(time(0));
147	unsigned char csms_ref = rand() % 128;
148
149	int part_count;
150
151	const int PDU_LEN = 153;
152
153	if (multipart)
154	{
155	if (message.length() > 800)
156	{
157	Common::instance()->logMessage("Trying to send multipart sms > 800 bytes !!!");
158	message = message.substr(0,800);
159	}
160
161	part_count = message.length() / PDU_LEN;
162	if (message.length() % PDU_LEN)
163	part_count++;
164	}
165	else
166	{
167	part_count = 1;
168	}
169
170	vector<PduInfo> result;
171	for (int partnr = 0; partnr < part_count; ++partnr)
172	{
173	vector<unsigned char> pdu;
174
175	pdu.push_back(0x00); // use SMSC from phone
176	pdu.push_back( 0x01\|UDHI ); // first octet -- no timeout
177	pdu.push_back(0x00); // TP-MR message reference
178	pdu.push_back(to.length() ); //length of phone nr
179	pdu.push_back(0x81); // type of address (international nr + ISDN/telephone range) - else try 0x81
180
181
182	string phone = EncodePhonenr(to);
183	pdu.insert( pdu.end(), phone.begin(), phone.end());
184
185	pdu.push_back(0x00); // Protocol identifier
186	pdu.push_back(0x00); // Data coding scheme
187
188	string message_part;
189	if (multipart)
190	{
191	message_part = message.substr(0, PDU_LEN);
192	message.erase(0, PDU_LEN);
193
194	pdu.push_back( message_part.length()+ 7 ); //UserDataLength
195	pdu.push_back( 0x06 ); // UDH Len
196	pdu.push_back( 0x00 ); // UDH Element Identifier
197	pdu.push_back( 0x03 ); // UDH element length
198	pdu.push_back( csms_ref ); // csms_ref reference
199	pdu.push_back( part_count );
200	pdu.push_back( partnr+1 );
201	pdu.push_back( 0x00);
202
203	}
204	else
205	{
206	if (message.length() > 160)
207	{
208	message_part = message.substr(0,160); //truncate to 160
209	Common::instance()->logMessage("Truncated message");
210	}
211	else
212	{
213	message_part = message;
214	}
215
216	pdu.push_back( message_part.length() ); //UserDataLength
217	}
218
219	vector<unsigned char> userData = Encode7to8bit(message_part);
220
221	pdu.insert( pdu.end(), userData.begin(), userData.end());
222
223	PduInfo info;
224	info.len = pdu.size()-1;
225	info.pdu = HexformatVector(pdu);
226	result.push_back(info);
227
228	}
229	return result;
230	}
231
232	typedef vector<unsigned char>::iterator char_it;
233
234	string DecodeRawPhonenr(char_it start, char_it end)
235	{
236	ostringstream os;
237
238	for (char_it it = start; it != end; ++it)
239	{
240	os.width(2);
241	os.fill('0');
242	os << hex << (int)(*it);
243	}
244	return DecodePhonenr(os.str());
245	}
246
247	string DecodeTimestamp(char_it start, char_it end)
248	{
249	string stamp = DecodeRawPhonenr(start,end);
250
251	ostringstream os;
252
253	os << stamp.substr(0,2) << "/"; //year
254	os << stamp.substr(2,2) << "/"; //month
255	os << stamp.substr(4,2) << ","; //day
256	os << stamp.substr(6,2) << ":"; //hour
257	os << stamp.substr(8,2) << ":"; //minute
258	os << stamp.substr(10,2) ; //second
259
260	int timezone = strtol(stamp.substr(12,2).c_str(), 0, 16);
261
262
263	if (timezone > 127)
264	os << "-";
265	else
266	os << "+";
267
268	os.width(2);
269	os.fill('0');
270	os << (timezone & 0x7F);
271
272	return os.str();
273	}
274
275
276	SMS ParseSmsPdu(std::string pdu_str)
277	{
278	SMS result;
279
280	vector<unsigned char> pdu = HexDecodeString(pdu_str);
281
282	vector<unsigned char>::iterator it = pdu.begin();
283
284	it += (*it++); // Skip smsc info
285
286	unsigned char deliver_first_octet = (*it++);
287
288	bool UDHI = (deliver_first_octet & 0x40) > 0;
289
290	unsigned char sender_len = (*it++);
291	if ( (sender_len % 2) == 1)
292	sender_len++;
293
294	++it; //ignore Type-Of-Address
295
296	result.sender = DecodeRawPhonenr( it, it+(sender_len/2) );
297
298	it += (sender_len/2);
299	++it; //protocol identifier
300	++it; //Data encoding
301
302	result.timestamp = DecodeTimestamp(it, it+7);
303	it += 7;
304
305
306	unsigned char data_len = (*it++);
307
308	int shift_start = 0;
309	if (UDHI)
310	{
311	int udh_len = (*it++);
312	cout << "UDH_LEN:" << udh_len << endl;
313	it += udh_len; //just ignore the User Data Header
314	data_len -= udh_len;
315
316	shift_start = udh_len+1; //make the 8to7bit decode start with the right shift level
317	}
318	cout << hex<< (int)(*it) << endl;;
319
320
321	vector<unsigned char> user_data;
322	user_data.insert(user_data.end(), it, it+data_len);
323
324	result.message = Decode8to7bit(user_data, shift_start);
325
326
327	return result;
328	}
329
330	}